Patent GB-931193-A (GB)
Title: Improvements in or relating to multi-purpose apparatus
IPC: B21D7/06
Filed: 1960-09-23
Abstract: 931,193. Assembling force fits; shearing; stamping; bending; riveting; machine-tool details. HYDRODYN A.G. Sept. 23, 1960 [Sept. 26, 1959], No. 32698/60. Classes 83 (3) and 83 (4). [Also in Groups XXIII and XXX] A multi-purpose apparatus comprises a double-acting reversible relatively-slidable working cylinder and piston actuated by fluid pressure, with two piston-rods secured to the piston extending one through each of two cylinder heads secured one to each end of the cylinder, one of the rods being provided with a fitting hole for the reception of a thrust tool and the cylinder head through which this rod extends having an externally screw-threaded part on to which a thrust tool part can be screwed, and the other rod being provided with an internally screw-threaded recess for the reception of a traction tool and the cylinder head through which this rod extends having an abutment rib for engaging another tool part. In an embodiment the apparatus consists of a cylinder 1 provided at each end with a cylinder head 2, 3 having a bearing 4, 5 for piston-rods 9 and 10, which are rigidly connected together by a spindle 8<SP>1</SP>. The adjacent ends of the pistonrods carry pistons 12 and 13 between which a packing ring 14 is arranged. The outwardly directed end of the piston-rod 9 has an internally threaded recess 15 for the reception of a traction tool (not shown) and the corresponding end of the piston-rod 10 has a recess 16 for receiving a thrust tool. The cylinder is provided with a ribbed handle 18 housing the fluid pressure connections from an electro-hydraulic high pressure pump in the housing G. Force fits-Fig. 2 shows the apparatus when used for drawing a bush 23 into a workpiece W. A draw rod 24 is screwed into the threaded recess in the piston-rod 9 and a support washer 25 is placed on the cylinder head. The draw rod is inserted through the opening in the workpiece and the bush is placed on the protruding end of the rod and secured by a collet 26 and washer 27. By operating the pedal F the bush is drawn into the workpiece opening. Bending.-In this embodiment for bending a tube R, Fig. 3, the support washer 25 possesses two support arms 28 carrying rollers 29 for engaging the tube R. A member 31 carrying a presser segment 32 is screwed into the pistonrod 9 of the cylinder 1, actuation of which effects the bending operation. Punching and shearing.-For punching, a stirrup 37, Fig. 5, is screwed on to the threaded part 8 of the cylinder head 3 and a plunger 38 co-operates with a die 39 on the lower arm of the stirrup. For cutting bars and wires, Fig. 6, a washer 40 carrying a steel bar provided with an abutment 41 is screwed on to the cylinder head 3. A steel bar 42 provided with a cutting edge is inserted in the aperture 16 of the pistonrod 10 and this co-operates with a cutting edge on the abutment 41, to sever the bar or wire S. This embodiment may be used for cutting sheet metal as shown on Fig. 7. Stamping.-In an embodiment for stamping sheet metal, the apparatus is carried by a vertically adjustable support 43 mounted on a stand P, Fig. 8. Broaching.-The cylinder head 3 is screwed into a clamp 44, Fig. 9, and the cylinder head 2 receives a housing 45 through the top of which the broach 46 is guided as it receives its reciprocation from the piston-rod 9.